Calculate the force of gravity on a 1-kilogram box located at a point 1.3 x 10 meters from the center of Earth if the force on a 2.5-kilogram box at the same point is
6.1 newtons

How to tell if a molecule is polar or nonpolar with electronegativity

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?